BuchneraSymbiosisAphidsMycorrhizaeSinorhizobium melilotiPlant Root NodulationNitrogen FixationRoot Nodules, PlantGenome, BacterialMedicago truncatulaLotusAliivibrio fischeriAnthranilate SynthaseMedicago sativaGlomeromycotaFabaceaePlant RootsRhizobiumPhylogenyBradyrhizobiumEvolution, MolecularSerratiaMolecular Sequence DataGammaproteobacteriaGenes, BacterialLuteovirusPeasMedicagoBacterial ProteinsDinoflagellidaAmino Acids, EssentialChaperonin 60RhizobiaceaeGene Expression Regulation, BacterialGenome SizeMesorhizobium